Barra Fan and Hebrides Terrace Seamount Marine Protected Area

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The Barra Fan and Hebrides Terrace Seamount MPA
Barra Fan and Hebrides Terrace Seamount MPA.png
The location and extent of The Barra Fan and Hebrides Terrace Seamount MPA, shown in red
Location North Atlantic, Scotland
Coordinates 56°36′N9°43′W / 56.600°N 9.717°W / 56.600; -9.717 Coordinates: 56°36′N9°43′W / 56.600°N 9.717°W / 56.600; -9.717
Area4,373 km2 (1,688 sq mi) [1]
Designation Scottish Government
Established2014
Operator Marine Scotland

The Barra Fan and Hebrides Terrace Seamount is the name given to a Nature Conservation Marine Protected Area that lies in Scottish waters to the west of the Outer Hebrides, adjacent to the boundary with Ireland. It covers two distinct geological features of the North Atlantic Ocean: the Barra Fan and the Hebrides Terrace Seamount. [2]

Contents

Barra Fan

The Barra Fan is a geological protected feature of the North Atlantic Ocean to the west of the Scottish island of Barra. It was formed by a series of submarine landslides that affected an area of subsea sediments. The fan lies to the east of the Hebrides Terrace Seamount, in a region known as the Hebridean Slope, where the seabed drops from the continental shelf, at a depth of c. 150 m below sea level, down to Rockall Trough (c. 2300 m below sea level). The topography of the seabed in the Barra Fan was modified by the action of icebergs grounding on the seabed during the ice ages, and has also been affected by the action of oceanic currents. [2]

Hebrides Terrace Seamount

The seamount of the Hebrides Terrace is thought to represent the remnant of an ancient volcano that rises to a height of almost 1 km above the surrounding seabed. It lies to the west of the Barra Fan, and supports a diverse range of marine life, including cold-water corals and deep sea sponges. The effect the seamount has on underwater currents is thought to ensure a good supply of food for many species of fish in the area, and the seamount is particularly associated with the orange roughy, a large long-living deep-sea fish. [2] Several species of whale and shark also visit the area. [3]

The seamount is the location of a positive gravity anomaly that is thought to indicate the presence of an igneous body of rock some 17 km thick. [4]

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Firth of Forth Banks Complex Seabed features at the entrance in the Firth of Forth in Scotland

The name Firth of Forth Banks Complex refers to a complex of sand and gravel sea banks in the North Sea, lying at the mouth of the Firth of Forth in the seas off the east coast of Scotland. From south to north the banks are named the Berwick Bank, the Scalp Bank, the Wee Bankie and the Montrose Bank. Since 2014 the banks have been protected as a single Nature Conservation Marine Protected Area, which comprises three discrete zones covering a total area of 213,000 hectares (2,130 km2) of Scottish Offshore Waters.

Geikie Slide Seabed feature in the North Atlantic

The Geikie Slide is a submarine landslide on the seabed of the North Atlantic Ocean to the northwest of Scotland. The slide occurs in a region known as the Hebridean Slope, the continental slope where the seabed drops from the continental shelf surrounding Britain into the deep ocean. Since 2014 an area of 2,215 square kilometres (855 sq mi) has been designated as a Nature Conservation Marine Protected Area under the name Geikie Slide and Hebridean Slope MPA.

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Hebrides Terrace Seamount is a seamount in the Atlantic Ocean, west-southwest from the Hebrides, Scotland. It formed through volcanism during the early Cenozoic in the Rockall Trough 60 million to 67 million years ago and afterwards sank below sea level. Presently, it is a flat-topped underwater mountain that rises to about 980 metres depth. "Coral gardens" that host a number of animals are found on its slopes.

Turbot Bank Seabed feature in the North Sea

The Turbot Bank is a shelf bank and mound feature of the seabed of the North Sea that lies off the east coast of Scotland, about 44 kilometres (27 mi) east of Peterhead. The depth of water above the bank varies from 60 m below sea level on top of the bank down to 80 m at its margins. It has been designated as a Nature Conservation Marine Protected Area since 2014.

West of Scotland Marine Protected Area Area of the North North Atlantic

The West of Scotland Marine Protected Area covers a large area of the North Atlantic to the west of the Outer Hebrides. The Marine Protected Area (MPA) was designated by the Scottish Government in 2020, replacing the Rosemary Bank MPA, which covered a much smaller area. Covering a sea area of over 100,000 square kilometres (39,000 sq mi), it is the largest marine protected area in Europe.

References

  1. "SiteLink: The Barra Fan and Hebrides Terrace Seamount MPA(NC)". NatureScot. Retrieved 12 October 2020.
  2. 1 2 3 "The Barra Fan and Hebrides Terrace Seamount MPA". Joint Nature Conservation Committee . Retrieved 27 November 2019.
  3. "The Barra Fan and Hebrides Terrace Seamount". Marine Conservation Society. Retrieved 27 November 2019.
  4. C King (2016). A revised correlation of Tertiary rocks in the British Isles and adjacent areas of NW Europe. The Geological Society. p. 576. ISBN   9781862397286.

Further reading